Improved non-conducting covering for steam boilers, pipes



I" 106. COMPOSITIONS,

COATING OR PLASTIC.

UNITED STATES PATENT OFFICE E. H. ASHCROFT, OF LYNN, MASSACHUSETTS.

IMPROVED NON-CONDUCTING COVERING FOR STEAM BOILERS,

PIPES, &c.

' Specification forming part of Letters Patent No. 59,338, dated November 6, 1866.

To-all whom it may concern:

Be it known that I, EDWARD H. ASHCROFT, of the city of Lynn, county of Essex, in the Commonwealth of Massachusetts, have invented a new and Improved Non-Conducting Covering for Steam Boilers, Pipes, &c.; and I' do hereby declare the following to be a true and exact description of the same.

The nature of my invention consists in providing a cheap and durable substitute for the hair or wool felting at present used as a coverin gfor steam boilers, pipes, 850., acting as a nonductor, economizing heat, preventing condensation of steam, accidents from fire, &c.

To enable those skilled in the art to make and use my invention, I will proceed to describe it.

The necessity of a non-conductin g substance is too well known to need any further reference, and its extensive use on s eam-y sse stzfike-s it an object isget ood and cheap material, the ordinary felting being expensive, and soon becomes destroyed by the high degree of heat generated by the boilers. I therefore take ordinar hair such as is used in mortars, and "mirmwith hydraulic cement lime and hydraulic cemen o a. as 01- lows': hair" and by ran 1 cemen air,.hydrau'lic cement, and plaster-of-paris; hair and cement of anykind, either of which can be appliedasa covering (making a mortar) directly upon boilers or pipes. A coating of hair may be laid on and the cement poured upon it, so as to cover it entirely.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

A non-cond uctin gcoverin g for steam boilers, pipes, &c., composed of the materials above named, and applied as described.

' E. H. ASHCROFT.

Witnesses: 1

JOHN P. WOODBURY, A. J. CHAN. 

